Fix typo in tc-cbq-details(8) manpage (occured -> occurred).

diff -urNad iproute-20070313~/man/man8/tc-cbq-details.8 iproute-20070313/man/man8/tc-cbq-details.8
--- iproute-20070313~/man/man8/tc-cbq-details.8	2007-06-10 19:25:18.000000000 +0200
+++ iproute-20070313/man/man8/tc-cbq-details.8	2007-06-10 19:25:58.000000000 +0200
@@ -210,7 +210,7 @@
 priority. If found, choose it, and terminate.
 .TP
 (iii)
-Choose the class at which break out to the fallback algorithm occured. Terminate.
+Choose the class at which break out to the fallback algorithm occurred. Terminate.
 .P
 The packet is enqueued to the class which was chosen when either algorithm 
 terminated. It is therefore possible for a packet to be enqueued *not* at a